try:
    people = int(input('屋中有人数:'))
    gangshu = int(input('抗原试剂杠数:'))
    if people <= gangshu and people*2 >= gangshu:
        print(f'阳性{gangshu-people}\n阴性{people-(gangshu-people)}')
    else:
        print('不是标准的阴阳同屋问题')
except:
    print('不是标准的阴阳同屋问题')